7+7= 34+5= 41+9= 75-30= 10+(99-9)=
18-6= 20-3= 28+6= 53-40= 56-5-10=
50+4= 73+8= 35+9= 6+17= 77-(7+2)=
11-8= 90-30= 84-80= 50-50= 59-30+4=
5+4=
10-7 =
8 - 2 =
9 - 5 =
2 + 3 =
9 - 7 =
8 + 2 =
3 + 5 =
7 - 4 =
10 - 8 =
3 + 2 =
9 + 1 =
6 + 3 =
10 - 10 =
4 - 2 =
0 - 0 =
9 - 4 =
10 - 5 =
2 + 7 =
8 - 3 =
31
38
39